During the production process of steel plant, a large amount of valuable zinc-bearing dust and sludge will be produced, including sintering dust, dedusting ash and sludge in blast furnace ,  electric furnace , converter, and mill scale, etc. For a long time, most of these zinc-bearing dusts have been recycled and directly returned to sintering for utilization. However, with the continuous enrichment of these harmful elements in the production cycle and the increasing proportion of waste galvanized mill scale used in steelmaking, some of them contain The zinc content in zinc dust and sludge materials is also gradually increasing, which affects the life of equipment and thus affects the production process.

The main components of these dusts are iron and carbon, but they also contain some harmful elements such as zinc, lead, potassium, and sodium. This part of the dust cannot be completely digested by the current conventional utilization methods, so this part of the dust can only be disposed of and landfilled. This not only wastes resources, but also pollutes the environment. And the zinc in the zinc-bearing dust can be recovered by using the rotary hearth furnace dezincification binder through the cold pressing technology.

Zinc-bearing dust from steel plants is not suitable for use in blast furnaces. In addition to environmental protection restrictions, the use of rotary hearth furnace dezincification binders through cold pressing technology and direct reduction technology in rotary hearth furnaces can solve the problem of zinc-bearing dust disposal. Recycling resources can also improve economic benefits. After the rotary hearth furnace reduces the pretreated materials, the materials are directly discharged to obtain metallized briquettes and metallized powder products. The high-temperature flue gas generated is recycled and reused by baghouse dust removal; the dust collected by baghouse dust removal is coarse zinc oxide powder. can be sold directly .

 Zinc oxide reduction in rotary hearth furnace has the characteristics of large production capacity, low energy consumption, and strong adaptability of raw materials. It is the mainstream development direction of comprehensive utilization of low zinc-bearing dust and sludge in iron and steel plants.

A new type of dezincification binder for rotary hearth furnaces , widely used in steel plant converter dedusting ash, blast furnace dedusting ash, OG sludge and mill scale and other dedusting ash processed into cold-pressed briquettes, added to the converter as slagging agent and adjust the temperature, and can also be used in the rotary hearth furnace(RHF) sintering and reduction to extract zinc oxide.

JIANJIE GROUP is a leading binder manufacturer and supplier located in Chengdu, China, which is a technological enterprise integrating R&D, production, sales and related service. Devoted to manufacturing binder products for more than twenty years, we have professional production equipment and processes, a strong technical team and a scientific management system.

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